Channel state information reporting for multiple transmit/receive points and frequency division duplex reciprocity

Abstract

Various aspects of the present disclosure relate to channel state information reporting for multiple transmit/receive points and frequency division duplex reciprocity. One apparatus includes at least one memory and at least one processor that is configured to a channel state information (“CSI”) reporting configuration, the CSI reporting configuration comprising an indicator of multi-point transmission, and a configuration comprising at least two groups of channel measurement resources (“CMRs”). The at least one processor determines at least one CSI report based on the at least two groups of CMRs, the at least one CSI report mapped to a transmission hypothesis corresponding to one of a single-point transmission and a multi-point transmission. The at least one processor transmits the at least one CSI report to the mobile wireless communication network, the at least one CSI report ordered according to a predefined priority.

1 . A user equipment (“UE”) for wireless communication, comprising:
 at least one memory; and 
 at least one processor coupled with the at least one memory and configured to cause the UE to:
 receive a channel state information (“CSI”) reporting configuration, the CSI reporting configuration comprising an indicator of multi-point transmission; 
 receives, from the mobile wireless communication network, a configuration comprising at least two groups of channel measurement resources (“CMRs”); 
 determine at least one CSI report based on the at least two groups of CMRs, the at least one CSI report mapped to a transmission hypothesis corresponding to a single-point transmission, a multi-point transmission, or a combination thereof; and 
 transmit the at least one CSI report. 
 
 
     
     
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         7 . The apparatus UE of  claim 1 , wherein a first subset of CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a single-point transmission hypothesis. 
     
     
         8 . The UE of  claim 1 , wherein a first subset of CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a multi-point transmission hypothesis. 
     
     
         9 . The UE of  claim 1 , wherein CMRs in a group corresponding to a single-point transmission hypothesis and a multi-point transmission hypothesis are mutually exclusive. 
     
     
         10 . The UE of  claim 1 , wherein a first subset of CMRs of a first group of the at least two CMR groups has a same size as a second subset of CMRs of a second group of the at least two CMR groups. 
     
     
         11 . The UE of  claim 10 , wherein each member of the first subset of CMRs of the first group of CMRs is paired with a distinct member of the second subset of CMRs of the second group of CMRs such that there is resulting in a one-to-one mapping between the first and second subsets of CMRs of the two subset groups of CMRs. 
     
     
         12 . The UE of  claim 1 , wherein the indicator of multi-point transmission comprises a higher-layer parameter received within a CSI reporting configuration. 
     
     
         13 . The UE of  claim 1 , wherein a single-point transmission corresponds to a CSI report with one precoder matrix indicator (“PMI”), and wherein a multi-point transmission corresponds to a CSI report with two PMIs. 
     
     
         14 . A method performed by a user equipment (“UE”), the method comprising:
 receiving a channel state information (“CSI”) reporting configuration, the CSI reporting configuration comprising an indicator of multi-point transmission; 
 receiving a configuration comprising at least two groups of channel measurement resources (“CMRs”); 
 determining at least one CSI report based on the at least two groups of CMRs, the at least one CSI report mapped to a transmission hypothesis corresponding to a single-point transmission, a multi-point transmission, or a combination thereof; and 
 transmitting the at least one CSI report. 
 
     
     
         15 . A network node apparatus base station for wireless communication, comprising:
 at least one memory; and   at least one processor coupled with the at least one memory and configured to cause the base station to:
 send a channel state information (“CSI”) reporting configuration, the CSI reporting configuration comprising an indicator of multi-point transmission; 
 send a configuration comprising at least two groups of channel measurement resources (“CMRs”); and 
 receive at least one CSI report. 
   
     
     
         16 . The method of  claim 14 , wherein a first subset of CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a single-point transmission hypothesis. 
     
     
         17 . The method of  claim 14 , wherein a first subset of the CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a multi-point transmission hypothesis. 
     
     
         18 . The method of  claim 14 , wherein a first subset of CMRs of a first group of the at least two CMR groups has a same size as a second subset of CMRs in a second group of the at least two CMR groups. 
     
     
         19 . The method of  claim 18 , wherein each member of the first subset of CMRs in the first group of CMRs is paired with a distinct member of the second subset of the CMRs in the second group of CMRs resulting in a one-to-one mapping between the first and second subsets of CMRs of the two groups of CMRs. 
     
     
         20 . The method of  claim 14 , wherein a single-point transmission corresponds to a CSI report with one precoder matrix indicator (“PMI”), and wherein a multi-point transmission corresponds to a CSI report with two PMIs. 
     
     
         21 . A processor for wireless communication, comprising:
 at least one controller coupled with at least one memory and configured to cause the processor to:
 receive a channel state information (“CSI”) reporting configuration, the CSI reporting configuration comprising an indicator of multi-point transmission; 
 receive a configuration comprising at least two groups of channel measurement resources (“CMRs”); 
 determine at least one CSI report based on the at least two groups of CMRs, the at least one CSI report mapped to a transmission hypothesis corresponding to a single-point transmission, a multi-point transmission, or a combination thereof; and 
 transmit the at least one CSI report, the at least one CSI report. 
   
     
     
         22 . The processor of  claim 21 , wherein a first subset of CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a single-point transmission hypothesis. 
     
     
         23 . The processor of  claim 21 , wherein a first subset of the CMRs of a first group of the at least two groups of CMRs and a second subset of CMRs of a second group of the at least two groups of CMRs correspond to a multi-point transmission hypothesis. 
     
     
         24 . The processor of  claim 21 , wherein a first subset of CMRs of a first group of the at least two CMR groups has a same size as a second subset of CMRs in a second group of the at least two CMR groups. 
     
     
         25 . The processor of  claim 24 , wherein each member of the first subset of CMRs in the first group of CMRs is paired with a distinct member of the second subset of the CMRs in the second group of CMRs resulting in a one-to-one mapping between the first and second subsets of CMRs of the two groups of CMRs.